The emerging steel-plastic composite pressure pipe, known as PSP (Polyethylene-Steel-Polyethylene), is a cutting-edge piping solution developed by Xinxing Casting Pipe Co., Ltd. This innovative product combines the best of both worlds: the strength and durability of steel with the corrosion resistance and lightweight properties of plastic. The structure consists of a welded steel pipe as the central layer, surrounded by inner and outer layers of poly(ethylene) propylene, bonded together using a special hot-melt adhesive. The entire system is manufactured through an extrusion molding process, ensuring a seamless and robust construction.
PSP pipes address many of the limitations of traditional plastic and steel pipes. They overcome issues such as corrosion, pollution, bulkiness, and short service life, while also reducing expansion and deformation problems. These pipes offer the combined advantages of both materials, including excellent oxygen barrier properties, high rigidity, and superior strength. Additionally, they are easy to detect when buried, making maintenance and repairs more efficient.
The product range includes several types tailored for different applications: cold water composite pipes (L), hot water composite pipes (R), gas composite pipes (Q), special fluid composite pipes (T), and protective casing composite pipes (B). These versatile pipes are widely used in urban and rural infrastructure for transporting potable water, heating systems, gas, industrial wastewater, corrosive fluids, and even coal mine water supply and drainage systems. They are also suitable for protecting power and communication cables.
Key features of the emerging steel-plastic composite pressure pipe include:
1. **High Mechanical Strength**: With a tensile strength ranging from 275 to 320 MPa, it is 7–8 times stronger than pure plastic pipes.
2. **Low Thermal Conductivity**: Its thermal conductivity is between 0.46–0.57 W/m·K, about 1/100 that of steel, making it energy-efficient.
3. **Low Linear Expansion Coefficient**: At 1.2 × 10â»âµ /°C, it’s 1/10 to 1/12 of that of plastic, minimizing thermal stress.
4. **Excellent Hydraulic Performance**: The smooth inner surface (roughness of 0.007 mm) reduces friction and prevents scaling, ensuring efficient fluid transport and eliminating water hammer noise.
5. **Corrosion Resistance**: The non-polar polyethylene layers are highly resistant to acids, alkalis, and salts, making it ideal for harsh environments.
6. **Hygienic and Safe**: It meets the GB/T 17219 standard and has received the “National Product Sanitary License for Drinking Water Health Safety†from Hebei Province, allowing its use in direct drinking water systems.
7. **Self-Tracing Ability**: Magnetic detection allows for easy location without the need for additional markers, reducing the risk of damage during excavation.
8. **Long Service Life**: Designed for normal temperature and pressure conditions, it can last up to 50 years.
9. **Easy Installation**: The mechanical connection method ensures strong sealing and enhanced pressure resistance compared to traditional piping.
For those looking for reliable distributors of PSP steel-plastic composite pressure pipes in Hubei Province, Wuhan Shuangyi Building Material Co., Ltd. is a trusted source.
**Contact:** Manager Fang
**Phone:** 13871173810 | 027—83516739
**Website:** [http://news.chinawj.com.cn](http://news.chinawj.com.cn)
Whether you're working on residential, commercial, or industrial projects, the emerging steel-plastic composite pressure pipe offers a durable, safe, and efficient solution for your piping needs.
2. Make the specimen relatively fixed;
3. It is convenient to use the capillary phenomenon to form a gradient when adding various reagents (staining agent, acid, salt solution);
4. Avoid contamination of the specimen.
The cover glass is covered on the material on the glass slide, which can avoid the contact between the liquid and the objective lens, so as not to contaminate the lens, and can make the top of the observed cells in the same plane, that is, the distance from the objective lens is the same, so that the observed Images are clearer.Why do you need a coverslip when using a microscope
1. Make the object to be observed form a thin film, which is easy to transmit light and easy to observe;2. Make the specimen relatively fixed;
3. It is convenient to use the capillary phenomenon to form a gradient when adding various reagents (staining agent, acid, salt solution);
4. Avoid contamination of the specimen.
The purpose of staining the specimen with iodine solution is to make the cells more obvious under the microscope, and it can also kill the cells and prevent the cells from migrating.
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